Improvement in packing for piston and other rods



l W. GRAM.

Packing for Pis'ton and other Rods.

Y Y WITNESSES: mwan'rom 4 v BY' J W 7 l griomms. I

MPETERS. PHOTUUTHOGRAFHfiR. WASHINGTON. D. c.

UNITED STATES PATENT ()FFIOE.

WILLIAM ORAM, OF RALEIGH, NORTH CAROLINA.

IMPROVEMENT-IN PACKINGFOR PISTON AND OTHER RODS.

Specification forming part of Letters Patent No. 203,596, dated May 14, 1878; application filed September 10, 1877.

To all whom it may concern:

Be it known that I, WILLIAM GRAM, of Raleigh, Wake county, North Carolina, have invented an Improvement in Steam-Engines, of which the following is a specification Figure 1 of drawing is a vertical section; Figs. 2 and 3, detail views of the packingrmgs. r

The invention will first be described in connection with the drawing, and then pointed out in the claims. 7

A represents the cylinder; B, its steamchest; 0, its valve, and D the piston. The latter is a trunk that extends through a cut ring, F, provided with lugs 12, which fit into corresponding recesses of a ring, F, the two being caused by the pressure of the steam to form a perfectly steam-tight joint with the trunk E and cylinder A.

G is a third and superposed ring, that forms,

with ring F, an intermediate chamber for the reception of a cotton or other fabric filling, which is saturated with some fluid lubricant. The rings F G are correspondinglybeveled, so as to converge with their opposite faces in an outward direction, and allowthe ring G, which is pressed by set-screws d, to produce a tendency of the lubricanttoward the trunk.

By the relative construction and atrangement of the rings F F, I secure an admirable steam-packing, and by the cooperation of the ring F with the pressurering G, "I cause the trunk to move smoothly and with a very trifling friction.

What I claim as new and of my invention 1s- 1. A trunk, E, steam-packed in the cylinder A by means of the cut ring F, provided with lugs b, and the recessed ring F, constructed and arranged as shown and described.

2. The pressure-ring G and ring F, constructed and arranged to form a chamber to receive a lubricant filling, which may bear against the trunk, in combination with the ring F, substantially as shown and described.

WILLIAM GRAM.

Witnesses:

J. McOALLUM, R. N. MITCHELL. 

